Changing out MHs

[Gilbert]

i currently have 2x175watt 10k MHs and im thinking about switching over to 20ks so my colors can pop a little more.
if i make the switch will there be any ill effect on my coral or fish with the sudden change in spectrum?
does anybody have pics or links to a tank lite with 20ks?

i also have 2x110watt vho actinics, just in case that would help my situation.

[brewercm]

Another option would be to switch over your VHO's to T5s and use one true actinic, and one ATI blue plus. That would help make your colors really pop from your corals. Not sure what ballast you're using for your VHO but it's possible that it could run T5's.

Just a thought since I just added a similar bulb (not ATI but same basic color) and was amazed at the change.

[Gilbert]

i have a hamilton technology light fixture so its and all in one type of set up. i dont think i would be able to change out the VHOs to T5s.

[DSAfanatic]

That would be a better option. That way you aren't losing any PAR bc of the higher kelvin light.

[brewercm]

Is it a 4' tank? Guessing from the 110 VHO's
If so you could go with something as cheap as this with a couple of the ATI Aquablue plus bulbs. I'm running the 36" version along with my TX5 unit just so I have more bulb cofiguration choice. It's not the best and best reflector but could work for what you are wanting. you could also go to the 20K bulb and if it's too blue change out one of your actinics with a Actinic White bulb.

http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+3733+19759&pcatid=19759

[brewercm]

Just thought of it but you could also try the Phoenix or Hamilton 14K bulb what would give you more blue to your lighting. I never cared for any of the 15K that I tried.

[Bill S]

You might try the Helios 20Ks. Here's photos of my tank (from a year ago) with them. They were a little blue at first, but then really improved. I'm still running them:

http://www.maast.org/forums/showthread.php?t=42181&highlight=streep